Carbonaceous particles and PM2.5 optical properties in Mexico City during the ACU15 campaign

Main Article Content

Naxieli Santiago-de la Rosa
Cristina Prieto
Ruben Pavia
Oscar Peralta
Harry Alvarez-Ospina
Isabel Saavedra
Telma Castro
Rocío García
María de la Luz Espinosa
Abraham Ortinez-Alvarez
Gerardo Ruíz-Suárez
Amparo Martínez-Arroyo


We measured the optical properties of aerosols with two photoacoustic spectrometers operating at 532 and 870 nm wavelengths and sampled PM2.5 to analyze the organic carbon (OC) and elemental carbon (EC) content. The measuring site was in the southwest corner of Mexico City. We sorted the data by OC/EC ratios and calculated four mass absorption efficiencies (MAEs) for each wavelength with linear regressions. The MAEs ranged from 2.27 to 19.75 and 2.03 to 15.26 m2 g–1 at 532 and 870 nm, respectively, with determination coefficients above 0.88, showing that the amount of OC modifies the absorption properties of particles, sometimes underestimating or overestimating the black carbon concentration. It is possible to choose the MAE based on the daily median O3 concentration when there is no information about the EC and OC composition.


Download data is not yet available.

Article Details

Author Biography

Oscar Peralta, Instituto de Ciencias de la Atmósfera y Cambio Climático, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica s/n, Ciudad Universitaria, 04510 Ciudad de México, México.

Licenciatura: 1985 – 1993. Ingeniería Química. Facultad de Química, UNAM Maestría: 1999 – 2001. Ciencias de la Atmósfera. Posgrado en Ciencias de la Tierra, UNAM Doctorado: 2002 – 2007. Ciencias de la Atmósfera. Posgrado en Ciencias de la Tierra, UNAM Posdoctorado: 2008 - 2009. Centro Mario Molina para Estudios Estratégicos sobre Energía y Medio Ambiente, AC

Sharing on:

PLUMX metrics